US20070230714A1 - Time-delay hearing instrument system and method - Google Patents

Time-delay hearing instrument system and method Download PDF

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Publication number
US20070230714A1
US20070230714A1 US11/396,805 US39680506A US2007230714A1 US 20070230714 A1 US20070230714 A1 US 20070230714A1 US 39680506 A US39680506 A US 39680506A US 2007230714 A1 US2007230714 A1 US 2007230714A1
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Prior art keywords
hearing instrument
signal
sound
ear
binaural
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US11/396,805
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English (en)
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Stephen Armstrong
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Gennum Corp
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Gennum Corp
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Priority to US11/396,805 priority Critical patent/US20070230714A1/en
Assigned to GENNUM CORPORATION reassignment GENNUM CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARMSTRONG, STEPHEN W.
Priority to EP07105157A priority patent/EP1843633A2/fr
Priority to JP2007095099A priority patent/JP2007282222A/ja
Publication of US20070230714A1 publication Critical patent/US20070230714A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/552—Binaural
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils

Definitions

  • the technology described in this patent document relates generally to the field of hearing instruments. More particularly, the technology described herein relates to binaural hearing instrument systems.
  • Binaural hearing systems exist that transmit sound into both ears.
  • an effect of transmitting the same sound into both ears at the same time is that the sound is perceived by the user as originating from inside the head or coming from straight ahead.
  • this can be disorienting.
  • a binaural hearing instrument may transmit the sound coming from a telephone speaker to both ears at the same time. This effect is disorienting to the user because the user expects the sound to come from the ear that the telephone speaker is adjacent to.
  • FIG. 1 is a schematic view of a first example time-delay binaural hearing instrument system.
  • FIG. 2 is a flow chart of the operation of the first example time-delay binaural hearing instrument system.
  • FIG. 3 is a flow chart of the operation of a second example time-delay binaural hearing instrument system.
  • FIG. 4 is a flow chart of the operation of a third example time-delay binaural hearing instrument system.
  • FIG. 5 is a diagram of a telephone application for an example time-delay binaural hearing instrument system having a microphone.
  • FIG. 6 is a diagram of a telephone application for an example time-delay binaural hearing instrument system having a telecoil.
  • FIG. 7 is a diagram of an input jack application for an example time-delay binaural hearing instrument system having an input jack that receives an electronic sound signal.
  • FIG. 8 depicts an example time-delay hearing instrument system on a user in an automobile.
  • FIG. 9 depicts an example time-delay hearing instrument system used as part of a video or teleconferencing application.
  • FIG. 10 is a flow chart of the operation of an example binaural hearing instrument system applying a time delay in both ears.
  • FIG. 11 is a diagram of an example time-delay binaural hearing instrument system applying a time delay to both ears.
  • FIG. 12 is a block diagram of an example hearing instrument showing a more-detailed example of communications circuitry.
  • FIG. 13 is a functional diagram of an example baseband processor for a hearing instrument.
  • a system such as the one described in FIGS. 12 and 13 , that is capable of streaming sound received from one hearing instrument to another, allows both of the user's ears to work together to hear a sound, even if the sound is coming primarily from one side.
  • the user may perceive that the sound is coming from inside their head or from straight ahead. The user loses some directional hearing capability, and this can be disorienting, particularly when the user knows the source of the sound is coming from one side.
  • FIG. 1 shows an example time-delay hearing instrument system 10 that includes a first hearing instrument 11 and a second hearing instrument 13 .
  • the first hearing instrument 11 includes a first microphone 111 , a first speaker 113 , and a first communications subsystem 115 , and these are each coupled to a first processing circuitry 117 .
  • the second hearing instrument 13 also includes a second microphone 131 , a second speaker 133 , and a second communications subsystem 135 that are each coupled to a second processing circuitry 137 .
  • the first and second communications subsystems 115 , 135 include an antenna and wireless circuitry that function to transmit sound signals over an air interface.
  • the communications subsystems 115 , 135 may include both transmitter and receiver circuitry for bi-directional communication with the other hearing instrument.
  • the communications subsystems 115 , 135 may use wireless protocols such as Bluetooth, IEEE 802.11, or WiFi, among others.
  • the communications subsystems 115 , 135 may be operable to broadcast at a range of frequencies, and may even reach frequencies at or below 900 MHz, as described in the co-owned previously filed application, titled, “Electrically Small Multi-Level Loop Antenna on Flex for Low Power Wireless Hearing Aid System,” U.S. application Ser. No. 10/986,394.
  • An example communications subsystem is described in greater detail in FIGS. 12 and 13 and the accompanying description.
  • the first processing circuitry 117 is operable to apply a time delay ( ⁇ T) to the received signal.
  • the second processing circuitry may apply the time delay ( ⁇ T) after the signal is transmitted to the second hearing instrument 13 .
  • both the first and second processing circuitry 117 , 137 may apply a time delay ( ⁇ T) to the signal.
  • the first and second processing circuitry 117 , 137 may also function to perform other hearing aid functions.
  • the processing circuitry 117 , 137 may include an integral processing device, such as a digital signal processor (DSP), for processing received signals.
  • DSP digital signal processor
  • the processing circuitry 117 , 137 may perform directional processing functions, sound compression functions, clear channel searching functions, or other signal processing functions.
  • the processing circuitry 117 , 137 may perform baseband processing functions on sound signals received from the microphones 111 , 113 or other audio inputs (e.g., CD player, television, etc.), such as audio compression, encoding, data formatting, framing, and/or other functions. Also, the processing circuitry 117 , 137 may perform baseband processing functions on received data, such as audio decompression and decoding, error detection, synchronization, and/or other functions. In addition to baseband processing functions, the processing circuitry 117 , 137 may perform other functions traditionally performed at the hearing instrument, such as directional processing, noise reduction and/or other functions. One possible type of processing circuitry that may be used is Gennum Corporation's part number GC5055.
  • processing circuitry could be the processor disclosed in U.S. patent application Ser. No. 11/100,732, titled “Binaural Hearing Instrument Systems and Methods.”
  • An example processing circuitry is described in more detail below with reference to FIGS. 12 and 13 .
  • the processing circuitry 117 , 137 and communications subsystems 115 , 135 may be arranged on one or more printed circuit boards, thin film circuits, thick film circuits, or some other type of circuit that may be sized to fit within a hearing instrument shell.
  • the communications subsystems 115 , 135 may be included in an external attachment to the hearing instruments 11 , 13 .
  • the antenna may be a low-power miniature antenna, such as the antenna described in the commonly-owned U.S. patent application Ser. No. 10/986,394, entitled “Antenna For A Wireless Hearing Aid System,” or U.S. patent application Ser. No. 10/986,394, entitled “Electrically Small Multi-Level Loop Antenna on Flex for Low Power Wireless Hearing Aid System,” both of which are herein incorporated by reference.
  • the system shown in FIG. 1 receives a sound signal at the first microphone 111 , and the signal is transmitted to the first processing circuitry 117 .
  • the first processing circuitry 117 processes the received signal to compensate for a hearing impairment of the ear it is associated with and/or to perform other processing functions.
  • the first processing circuitry 117 also applies a time delay ( ⁇ T) to the received signal and transmits the delayed signal to the first communications subsystem 115 , where the signal is wirelessly transmitted over the air to the second example hearing instrument 13 .
  • ⁇ T WP wireless propagation delay
  • the first hearing instrument 11 thus also applies a wireless propagation delay ( ⁇ T WP ) 114 to the processed signal, and the resultant signal is broadcast by the first speaker 113 .
  • the second communications subsystem 135 After receiving the time-delayed signal (sound+ ⁇ T), the second communications subsystem 135 transmits the signal to the second processing circuitry 137 . In most cases, the time-delayed signal will be further processed in the second processing circuitry 137 to compensate for the particular hearing deficiency of the ear it is associated with. After any further processing is completed, the second processing circuitry 137 passes the time-delayed signal to the second speaker 133 for broadcasting. In this manner, the sound signal broadcast by the second speaker 133 is delayed by an amount ⁇ T with respect to the sound signal broadcast by the first speaker 113 .
  • the time delay ⁇ T causes the hearing instrument user to perceive the sound as coming from the side of the head from which the sound signal is received by the first microphone 111 .
  • broadcasting the signal into both ears provides an additional benefit in that the user perceives a louder apparent sound than if the sound signal were only broadcast into one ear.
  • This phenomenon is known as binaural loudness summation.
  • the magnitude of this apparent loudness growth is typically on the order of 3-7 dB.
  • the effect caused by the time delay ⁇ T has been found to work with amplitude differences of up to 10 dB between ears. That is, the signal transmitted to the opposite ear may be amplified by up to 10 dB and still create the illusion that the sound originated in the other ear.
  • the combination of the binaural loudness summation and additional amplification may thus result in a much loader perceived sound overall than would otherwise be possible in a monaural situation. This may be particularly useful for listening to telephone sounds because microphone pickup of telephone sounds has a tendency for acoustic feedback when the telephone receiver is brought close to the head.
  • FIG. 2 is an example operational flow-chart that corresponds to the operation of the system 10 in FIG. 1 , and follows a time line 200 as it progresses down the page.
  • the wireless propagation delay ( ⁇ T WP ) is not shown in FIG. 2 or any of the other remaining Figures. It should be understood, however, that in each example the sound signal may be delayed in the hearing instrument receiving the signal to compensate for the wireless propagation delay ( ⁇ T WP ), as described above with reference to FIG. 1 .
  • the first hearing instrument 11 receives a sound 201 , and then broadcasts the signal to a first ear of a user 203 and wirelessly transmits a time-delayed signal 205 to the second hearing instrument 13 .
  • the time-delayed signal is then broadcast the user's second ear 207 by the second hearing instrument 13 .
  • ⁇ T time delay
  • FIG. 3 is a second example operational flow-chart that follows a time line 200 as it progresses down the page.
  • the process begins when a first hearing instrument 211 receives a sound 221 . Then, the first hearing instrument 211 transmits the sound to a user's first ear 223 and wirelessly transmits 224 the sound as a signal to the second hearing instrument 213 .
  • the first hearing instrument 211 does not apply the time delay ( ⁇ T), but, instead, the second hearing instrument applies the time delay ( ⁇ T) 225 after receiving the signal 224 .
  • the time-delayed signal is then broadcast to the user's second ear 227 , as in the example of FIG.
  • FIG. 4 is a third example operational flow-chart that follows a time line 300 as it progresses down the page.
  • the first hearing instrument 311 receives a sound signal 321 and then broadcasts the signal to a first ear of a user 323 .
  • the first hearing instrument 311 also applies a time delay ( ⁇ T) to the sound signal 325 , and wirelessly transmits 326 the signal to the second hearing instrument 313 . After the time-delayed signal is received, it is mixed 327 with sound concurrently received 329 by the second hearing instrument 313 .
  • ⁇ T time delay
  • the mixed sound signal is then transmitted to the user's second ear 341 a short time ( ⁇ T) after the sound received by the first hearing instrument was transmitted to the user's first ear, causing the user to perceive the sound as coming from the direction of the first ear.
  • ⁇ T short time
  • This example provides the user with a time-delayed signal received from one side of the user, which has the benefits described above, but does not interrupt the real-time binaural sound receiving function of the hearing instrument system.
  • This series of operations could be performed on the hearing instrument system 10 of FIG. 1 with a modification to make the second processing circuitry 137 mix the sounds from the first and second hearing instruments 11 , 13 .
  • FIGS. 5-8 show some example applications of a time-delay hearing instrument system.
  • FIG. 5 shows a telephone application including first and second hearing instruments 511 , 513 , and a telephone 515 .
  • a microphone 521 on the second hearing instrument 513 receives the sound and broadcasts it to the user's second ear 532 .
  • the signal is also wirelessly transmitted to the first hearing instrument 513 .
  • the first hearing instrument applies a short time delay ( ⁇ T) and transmits the time-delayed sound to the user's first ear 531 .
  • ⁇ T short time delay
  • the example time-delay hearing instrument system is particularly beneficial in this application, because the user knows the sound is coming from one side. As discussed above, if the sound arrived in the ears at the same time it would be disorienting, because the sound would be perceived to be coming from inside the user's head. The time delay operation allows the user to hear the conversation in both ears, and also provides the proper direction of where the sound is originating from.
  • One or both of the first and second hearing instruments 511 , 513 could also include an input device, such as a button on one of the hearing instruments, to enter the time-delay mode. Moreover, a user could turn the time-delay mode on when they are using the phone, and off when the phone conversation is over by pressing a button on the hearing instrument or by some other means. The user could also choose or switch which ear is to receive the delay, and toggle mixing the sound from both hearing instruments 511 , 513 as shown in FIG. 4 by pressing a button.
  • FIG. 6 shows a variation of the example telephone application of FIG. 5 , where the second hearing instrument 513 includes a telecoil 523 .
  • the telecoil 523 functions to detect the electromagnetic field vibrations that emanate from a diaphragm in the telephone 515 earpiece.
  • the telecoil 523 can more directly detect the signal coming from the telephone 515 and provides enhanced performance in transmitting sounds from the telephone 515 to a hearing instrument user.
  • the time-delay operation of the first and second hearing instruments 511 , 513 is otherwise the same as in FIG. 5 .
  • one or more of the first and second hearing instruments 511 , 513 could also include an input device to turn the time-delay mode off and on, switch ears, and toggle mixing.
  • the telecoil 523 could also be turned on or off with an input device, such as a button. Since the telecoil 523 is primarily used with a telephone application, it may be beneficial to provide for automatic activation of the time-delay mode, when the telecoil 523 is activated. This would decrease the number of input devices, saving space and costs.
  • FIG. 7 shows an example input jack application that includes first and second hearing instruments 711 , 713 , and an input jack 721 .
  • the first hearing instrument 711 is provided with a port 723 for receiving the input jack 721 .
  • the jack 721 may be connected to any device that provides electronic sound signals. For applications where it is desirable for the user to perceive the sound as coming from one side, the time-delay operation may be engaged by the user with an input device, such as a button.
  • the hearing instrument 711 When the time-delay mode is engaged, the signal from the input jack 721 is transmitted from the first hearing instrument 711 as sound to the user's first ear, and a signal will be wirelessly transmitted to the second hearing instrument 713 and time delayed before it is transmitted as sound to the user's second ear 532 .
  • the hearing instrument 711 may be configured to automatically apply the time-delay operation to all input from the input jack 721 . Thereby saving space and cost.
  • Examples of audio applications that may benefit from this example include a phone that is connected through the input jack 721 to the hearing instrument 711 , and a performance or event that has an input jack 721 available to a hearing instrument user, particularly if the jack is located to one side of where the sound is originating.
  • FIG. 8 shows an automobile application for an example time-delay hearing instrument system 810 .
  • Automobiles may present a particular problem for hearing instrument users, because the vehicle and road noise, which is amplified along with other noises, can drown out the conversation with other persons in the automobile 830 . This may particularly be a problem if the user has better hearing in the ear nearest the exterior of the vehicle.
  • FIG. 8 shows a user 820 seated in the driver's seat of an automobile 830 , and a passenger 821 is seated beside the user 820 .
  • the user 820 is wearing a time-delay hearing instrument system 810 that includes a first hearing instrument 841 and a second hearing instrument 842 , shown here in a diagram format.
  • ⁇ T time delay
  • the example time-delay hearing instrument system 810 is a superior solution, because it allows a user 820 to have hearing amplification from both sides, hear conversations in the automobile 830 better in both ears, and also not have the detrimental disorienting effect.
  • FIG. 9 shows an example time-delay hearing instrument system 910 that is beneficially used in a video or teleconference setting.
  • One difficulty with teleconferencing and video conferencing is that when multiple persons are involved at one connection, it may be difficult for a person at another connection to distinguish between who is talking.
  • An example time-delay binaural hearing instrument system 910 can be used to provide a solution to this problem that is especially useful to those that have hearing deficiencies.
  • FIG. 9 shows a first connection where a speakerphone 920 is sitting on a table with two persons sitting on each side of the speakerphone 920 .
  • the speakerphone 920 has at least two microphones 921 , 923 directed to at least a first side and a second side.
  • a user 930 is at a second connection and is listening to the conversation at the first connection through an example time-delay hearing instrument system 910 .
  • the example time-delay hearing instrument system 910 is receiving sound from the second connection via a wired or wireless link 911 .
  • the link for example, may go to a telephone or a computer that is accessing the first connection over the internet or through a phone line.
  • the speakerphone 920 is configured to detect from which side the sound is emanating.
  • the speakerphone 920 may then transmit a data signal along with the sound signal transmission to communicate to the time-delay hearing instrument system 910 which side the sound is coming from.
  • the example time-delay hearing instrument system 910 is configured to apply a time delay ( ⁇ T) 915 to the sound transmitted to each ear of the user according to which side of the speakerphone 920 the sound originated from.
  • ⁇ T time delay
  • FIG. 10 shows an operational flow chart of a time-delay binaural hearing instrument system that applies a time delay in both a first hearing instrument 1011 and a second hearing instrument 1012 .
  • sound A and sound B are received at the same time 1021 , 1031 .
  • a short time delay ( ⁇ T) is applied to each signal 1023 , 1033 .
  • These sounds A, B may also be transmitted to the speakers on the respective hearing instruments, but this is not shown for the sake of clarity.
  • the sound signals A and B are transmitted 1024 , 1034 , respectively to the second and first hearing instruments 1012 , 1011 .
  • the time delays 1023 , 1033 are occurring or just after the time delays 1023 , 1033 end, sounds C and D are being received 1025 , 1035 by the first and second hearing instruments 1011 , 1012 .
  • the currently received sound C and the time-delayed sound A are mixed 1027
  • the currently received sound D and the time-delayed sound B are mixed 1037 .
  • the mixed signals are transmitted to the first and second ears of a user 1029 , 1039 .
  • the time delays 1023 , 1033 could be applied after the signals A and B are transmitted 1024 , 1034 , by the opposite hearing instrument.
  • FIG. 11 A similar operation is shown in a diagram of an example time-delay binaural hearing instrument system 1110 in FIG. 11 that has a first and second hearing instrument 1121 , 1131 .
  • a time delay ( ⁇ T) is applied 1225 by the processing circuitry.
  • the time-delayed signal 1 B is then transmitted wirelessly to the second hearing instrument 1131 by a communications subsystem.
  • the same process occurs in the second hearing instrument 1131 with respect to the sound labeled 2 A: the sound 2 A is received at the second microphone 1133 , then the signal is time delayed 1135 , and transmitted to the first hearing instrument 1121 .
  • time-delayed signal 1 B When the time-delayed signal 1 B is received in the second hearing instrument 1131 it is mixed 1137 with an undelayed currently received signal and transmitted to the user's second ear 1152 as a mixed signal.
  • time-delayed signal 2 B When the time-delayed signal 2 B is received in the first hearing instrument 1121 it is mixed 1127 with an undelayed currently received signal and transmitted to the user's first ear 1151 as a mixed signal.
  • the example operations of the example time-delay binaural hearing instrument systems of FIGS. 10 and 11 may be activated by an input device located on one or both of the hearing instruments. These examples may be used in the video and teleconferencing application of FIG. 9 . These examples may also enhance the user's ability to perceive which direction a sound is coming from in other applications.
  • FIG. 12 is a block diagram of an example hearing instrument 1200 showing a more-detailed example of the processing and communications circuitry.
  • the example hearing instrument 1200 includes an RF communication module 1212 , a hearing instrument processor 1214 , an antenna 1216 , one or more hearing instrument microphones 1218 , a hearing instrument speaker 1220 , and one or more external components 1222 (e.g., resistive and reactive circuit components, filters, oscillators, etc.)
  • the RF communication module 1212 and the hearing instrument processor 1214 may each be implemented on a single integrated circuit, but in other examples could include multiple integrated circuits and/or external circuit components.
  • the RF communication module 1212 includes a baseband processor 1240 and communications circuitry.
  • the communications circuitry includes a transmit path and a receive path.
  • the receive path includes a low noise amplifier (LNA) 1224 , a down conversion quadrature mixer 1226 , 1228 , buffering amplifiers 1226 , 1228 , an I-Q image reject filter 1234 and a slicer 1236 , 1238 .
  • the transmit path includes a modulator 1241 , an up conversion quadrature mixer 1242 , 1244 and a power amplifier 1246 .
  • the receive and transmit paths are supported and controlled by the baseband processor 1240 and clock synthesis circuitry 1248 , 1250 , 1252 .
  • the clock synthesis circuitry includes an oscillator 1248 , a phase locked loop circuit 1250 and a controller 1252 .
  • the oscillator 1248 may, for example, use an off chip high Q resonator (e.g., crystal or equivalent) 1222 .
  • the frequency of the phase locked loop circuit 1250 is set by the controller 1252 , and controls the operating frequency channel and frequency band.
  • the controller 1252 may, for example, select the operating frequency channel and/or frequency band of the system.
  • support blocks 1254 which may include voltage and current references, trimming components, bias generators and/or other circuit components for supporting the operation of the transceiver circuitry.
  • an RF signal received by the antenna 1216 is amplified by the LNA 1224 , which feeds the down conversion mixer 1226 , 1228 to translate the desired RF band to a complex signal.
  • the output of the down conversion mixer 1226 , 1228 is then buffered 1230 , 1232 , filtered by the image reject filter 1234 and slicer 1236 , 1238 and input to the baseband processor 1240 .
  • the baseband processor 1240 performs baseband processing functions, such as synchronizing the incoming data stream, extracting the main payload and any auxiliary data channels (RSSI and AFC information), and performing necessary error detection and correction on the data blocks.
  • the baseband processor 1240 decompresses/decodes the received data blocks to extract the sound signal.
  • Outgoing sound and/or control signals may be encoded and formatted for RF transmission by the baseband processor 1240 .
  • the baseband processor 1240 may also perform sound compression functions.
  • the processed signal is modulated to an RF carrier by the modulator 1241 and up conversion mixer 1242 , 1244 .
  • the RF signal is then amplified by the power amplifier 1246 and transmitted over the air medium by the antenna 1216 .
  • the hearing instrument processor 1214 functions to time delay signals received from the one or more microphones 218 , and may perform traditional hearing instrument processing functions to compensate for the hearing impairments of a hearing instrument user, along with the binaural processing functions described herein.
  • the hearing instrument processor 1214 may also perform other signal processing functions, such as directional processing, occlusion cancellation, or other functions.
  • FIG. 13 is a functional diagram of an example baseband processor 1360 for a hearing instrument.
  • the baseband processor 1360 may perform receiver baseband processing functions 1362 , interface functions 1364 and transmitter baseband processing functions 1366 .
  • the illustrated baseband processor 1360 includes two receiver inputs, two interface input/outputs, and two transmitter outputs, corresponding to the input/outputs to the baseband processor 1240 shown in FIG. 12 . It should be understood, however, that other input/output configurations could be used.
  • the receiver baseband processing functions 1362 include signal level baseband functions 1368 , 1370 , such as a synchronization function 1370 to synchronize with the incoming data stream, and a data extraction function 1368 for extracting the payload data. Also included in the receiver functions 1362 are an error detection function 1372 for detecting and correcting errors in the received data blocks, and a sound decompression decoding function 1374 for extracting a sound signal from the received data blocks.
  • the transmitter baseband processing functions 1366 include data formatting 1380 and framing 1384 functions for converting outgoing data into an RF communication protocol and an encoding function 1382 for error correction and data protection.
  • the RF communication protocol may be selected to support the transmission of high quality audio data as well as general control data, and may support a variable data rate with automatic recognition by the receiver.
  • the encoding function 1382 may be configurable to adjust the amount of protection based on the content of the data. For example, portions of the data payload that are more critical to the audio band from 100 Hz to 8 kHz may be protected more than data representing audio from 8 kHz to 16 kHz. In this manner, high quality audio, although in a narrower band, may still be recovered in a noisy environment.
  • the transmitter baseband processing functions 1366 may include an audio compression function for compressing outgoing audio data for bandwidth efficient transmission.
  • the interface functions 1364 include a configuration function 1376 and a data/sound transfer function 1378 .
  • the data/sound transfer function 1378 may be used to transfer data between the baseband processor 1360 and other circuit components (e.g., a hearing instrument processor) or external devices (e.g., computer, CD player, etc.)
  • the configuration function 1376 may be used to control the operation of the communications circuitry.
  • the configuration function 1376 may communication with a controller 1352 in the communications circuitry to select the operating frequency channel and/or frequency band.
  • time delay and communications subsystem described herein may instead be incorporated in devices other than a hearing instrument, such as a wired or wireless headset, a pair of communication ear-buds, a body worn control device, or other communication devices that are capable of communicating separately to two ears.

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  • Otolaryngology (AREA)
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US11/396,805 US20070230714A1 (en) 2006-04-03 2006-04-03 Time-delay hearing instrument system and method
EP07105157A EP1843633A2 (fr) 2006-04-03 2007-03-28 Système et procédé pour dispositif auditif à action temporisée
JP2007095099A JP2007282222A (ja) 2006-04-03 2007-03-30 時間遅延補聴器システムおよび方法

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Cited By (37)

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US20090154742A1 (en) * 2007-12-14 2009-06-18 Karsten Bo Rasmussen Hearing device, hearing device system and method of controlling the hearing device system
US20090196443A1 (en) * 2008-01-31 2009-08-06 Merry Electronics Co., Ltd. Wireless earphone system with hearing aid function
US20100157790A1 (en) * 2008-12-22 2010-06-24 Gn Resound A/S Error correction scheme in a hearing system wireless network
WO2011015675A2 (fr) 2010-11-24 2011-02-10 Phonak Ag Système et procédé d’aide auditive
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